<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        
        function i() {
            let i = 0;
            
            function l() {
                i++;
                console.log(i)
            }
            // let time = setInterval(function() {
            // i++;
            // },1000)
            return l;
        }
        let fn = i()

        console.log(fn())
        console.log(fn())
    </script>
</body>
</html>